O-Ring S Series
Brand :
MISUMI
Caution
Product Description
【Product Overview】
O-rings are sealing components that utilize the elastic interference of rubber materials.
The economical O-ring S Series is manufactured according to the JIS B 2401 S Series standard.
The usage method is fixed type, and after installation, the O-ring remains in a fixed position.
【Product Feature】
1. Simple structure and easy installation.
2. Wide variety of materials and sizes.
Product Overview
The O-ring is a sealing component that utilizes the elastic interference of rubber materials. The economical S series O-rings are manufactured according to the JIS B 2401 S series standard.
The usage method is fixed; after installation, the O-ring remains in a fixed position.
The usage method is fixed; after installation, the O-ring remains in a fixed position.
Dimensional Drawing
Specification Overview
The economical O-ring S series is available in two materials: Nitrile rubber and fluoro rubber.
Ample stock available for same-day shipping.
Ample stock available for same-day shipping.
| Type |  Material |  Hardness (JIS Hs) | Color | Usable temperature range | Application | |
| E-PACK-NSA | Nitrile Rubber | HS65 | +10 0 | Black | -20 to 100°C | For mineral oil resistance |
| E-PACK-NSF | Fluoro Rubber | HS65 | +10 0 | Black | -10 to 200°C | For high temperature resistance |
| E-PACK-NSFH | Fluoro Rubber | HS85 | +10 0 | Black | -10 to 200°C | |
Specification Table
| Type | Nominal Number | W | Inner Diameter | Compatible Materials | ||||||
| Type | No. | do | NSA Tolerance | NSF·NSFH Tolerance | d | Tolerance | D | Tolerance | ||
| E-PACK-NSA (Nitrile Rubber, Black) E-PACK-NSF (Fluoro Rubber, Black) E-PACK-NSFH (Fluoro Rubber, Black) | 3 | 3 | 1.5±0.1 | 2.5 | ±0.15 | ±0.30 | 3 | 0 -0.05 | 5 | 0.05 0 |
| 4 | 4 | 3.5 | 4 | 6 | ||||||
| 5 | 5 | 4.5 | 5 | 7 | ||||||
| 6 | 6 | 5.5 | 6 | 8 | ||||||
| 7 | 7 | 6.5 | 7 | 9 | ||||||
| 8 | 8 | 7.5 | 8 | 10 | ||||||
| 9 | 9 | 8.5 | 9 | 11 | ||||||
| 10 | 10 | 9.5 | 10 | 12 | ||||||
| 11.2 | 11.2 | 10.7 | 11.2 | 13.2 | ||||||
| 12 | 12 | 11.5 | 12 | 14 | ||||||
| 12.5 | 12.5 | 12 | 12.5 | 14.5 | ||||||
| 14 | 14 | 13.5 | 14 | 16 | ||||||
| 15 | 15 | 14.5 | 15 | 17 | ||||||
| 16 | 16 | 15.5 | 16 | 18 | ||||||
| 18 | 18 | 17.5 | 18 | 20 | ||||||
| 20 | 20 | 19.5 | 20 | 22 | ||||||
| 22 | 22 | 21.5 | 22 | 24 | ||||||
| 22.4 | 22.4 | 2.0±0.1 | 21.9 | 22.4 | 25.4 | |||||
| 24 | 24 | 23.5 | 24 | 27 | ||||||
| 25 | 25 | 24.5 | 25 | 28 | ||||||
| 26 | 26 | 25.5 | 26 | 29 | ||||||
| 28 | 28 | 27.5 | 28 | 31 | ||||||
| 29 | 29 | 28.5 | 29 | 32 | ||||||
| 30 | 30 | 29.5 | 30 | 33 | ||||||
| 31.5 | 31.5 | 31 | 31.5 | 34.5 | ||||||
| 32 | 32 | 31.5 | 32 | 35 | ||||||
| 34 | 34 | 33.5 | 34 | 37 | ||||||
| 35 | 35 | 34.5 | 35 | 38 | ||||||
| 35.5 | 35.5 | 35 | 35.5 | 38.5 | ||||||
| 36 | 36 | 35.5 | 36 | 39 | ||||||
| 38 | 38 | 37.5 | 38 | 41 | ||||||
| 39 | 39 | 38.5 | 39 | 42 | ||||||
| 40 | 40 | 39.5 | 40 | 43 | ||||||
| 42 | 42 | 41.5 | ±0.25 | ±0.50 | 42 | 45 | ||||
| 44 | 44 | 43.5 | 44 | 47 | ||||||
| 45 | 45 | 44.5 | 45 | 48 | ||||||
| 46 | 46 | 45.5 | 46 | 49 | ||||||
| 48 | 48 | 47.5 | 48 | 51 | ||||||
| 50 | 50 | 49.5 | 50 | 53 | ||||||
Product Features
1. Simple structure and easy installation.
2. Available in a wide range of materials and sizes.
3. Ample stock and prompt delivery.
2. Available in a wide range of materials and sizes.
3. Ample stock and prompt delivery.
Usage Method
Detailed installation dimensions
| Type | No. | G dimension (tolerance +0.25/0) | H dimension H±0.05 | R dimension Maximum value | ||
| No protective washer | Single-sided protective washer | Double-sided protective washer | ||||
| E-PACK-NSA E-PACK-NSF·E-PACK-NSFH | 3 to 22 | 2.5 | - | - | 1 | 0.2 |
| 22.4–50 | 2.7 | - | - | 1.5 | 0.4 | |
Precautions
When synthetic rubber comes into contact with different liquids, the following phenomena may occur depending on the type of liquid.
● Swelling after absorbing liquid (swelling)
● Bond breakdown due to chemical reaction (decomposition)
● Product becomes thinner after additives precipitate (extraction)
These adverse reactions in rubber often lead to poor sealing performance in sealing products. It is recommended to first confirm whether the material and the sealing medium will react when selecting materials for sealing products.
In addition, temperature and the type of additives will also affect the reaction results; even the same medium may react differently at different temperatures. When liquids are mixed, the effect on rubber is multiplied due to the combined effect.
● Swelling after absorbing liquid (swelling)
● Bond breakdown due to chemical reaction (decomposition)
● Product becomes thinner after additives precipitate (extraction)
These adverse reactions in rubber often lead to poor sealing performance in sealing products. It is recommended to first confirm whether the material and the sealing medium will react when selecting materials for sealing products.
In addition, temperature and the type of additives will also affect the reaction results; even the same medium may react differently at different temperatures. When liquids are mixed, the effect on rubber is multiplied due to the combined effect.
Example of Use
Example of Use images are for reference only.